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(No Model.) I 2Sheets-Sheet 1.

J. MEYRUEIS. TREATMENT OF SODIUM GHLORID.

"No. 560,518. Patented May 19, 1896.

IINDREW BGHMIAM. PHOTOUI'HUJIRSNINII'WLQC.

(1 10 ModeIT) 2 Sheet ;s-Sheet 2' v J. MEYRUEIS.

TREATMENT OF SODIUM GHLORID.

Patented May 19, 1896.

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ANDREW mnlhmnmo-ummwnsmumu.nc'

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.IULES MEYRUEIS, or PARIS, FRANCE.

TREATMENT QF SODIUM CHLORID.

SPECIFICATION forming part of Letters Patent No. 560,518, dated May 19, 1896. Application filed July 24, 1898. Serial No. 481,371. (No specimens.) Patented in France January 31,1893, No. 227,540.

To all whom it may concern.-

Be it known that I, J ULns MEYRUEIS, of the Oompagnie Electro-Chimique de St. Bron, a

citizen of the French Republic, and a resident of Paris, Department of the Seine, France, have invented a certain new and useful Improvement in the Treatment of Sodium Ohlorid for the Production of WVhite Lead, Soda, and Ohlorin, (for which a patent has been granted in France, No. 227,540, dated January 31, 1893,) of which the following is a specification.

The purpose of this invention is to provide a method of treating sodium chlorid so that various products may be obtained therefrom-namely, white lead, bicarbonate of soda, and chlorin.

Reference being made to the annexed drawings, Figure 1 is an elevational diagram of part of the apparatus. Fig. 2 is a similar view, partly in section, of the remainder of the apparatus. tusnamely, the electrolyzing-cells-in section.

According to the present invention the sodium chlorid in solution in water is subjected to the electrolytic action of an electric current in a cell or series of cells X, divided by a porous diaphragm a, separating the electrolyte in which the anode dips from that in which the cathode is situated. This series of cells X is shown in Fig. 3, in which, as aforesaid, a represents the poro us diaphragms in the form of closed vessels; 1) b b, the anodes; c c c, the cathodes; d d d, the metallic connections between the anodes and the cathodes of the series of cells; 6 e e, the pipes with thistle -tops receiving the solution for the cathodes in each cell and carrying said solution first to the bottom of'the cell.

f f f are the deliiery-pipes for the overplus of solution from the cells, the last of which empties into the pipe X, by which the'solu- 'tion is carried to vessel A for further treatspaces of the porous cells a a to together at their upper parts, the last porous cell communicating with the pipe X by which, as hereinafter described, the chlorin gas developed in the porous cells a is carried off. h h h Fig. 3 shows part of the appararepresent the exterior cells of the battery or series X.

t' is the pipe supplying the last-mentioned electrolyte to the first thistle-tube e. The former electrolyte is left at rest and consists of a solution of chlorid of sodium kept always concentrated and also acidified by addition of hydrochloric acid. The latter electrolyte for the cathode is composed of a solution of chlorid of sodium more or less concentrated and is kept in movement. The chlorin gas given off from the former solution when the electric current is passed through the battery is drawn off and serves for use, as hereinafter shown, while the second solution becomes constantly more and more saturated with hydrate of soda. It is this gradual enrichment of the solution with sodium hydrate and the faculty of drawing off the solution continuously or otherwise, just as it contains the desired percentage of sodium hydrate,

that enable the products before mentioned to be obtained.

The apparatus is regulated to deliver a liquor having about one hundred and twenty grams of caustic soda in each liter of solution. This liquid, received as before in the vessel A, is run off continuously through pipe B to the vessel or boiler O, in which is the mechanical mixer D. This boiler will have been previously partially filled with a charge of litharge. A furnace E is placed under the boiler 0, since heat assists the solution of the litharge in the liquor. This hot solution runs off continuously at the pipe F into carbonators or carbonating vessels G G, traversed by a current of carbonic acid. The white lead being insoluble separates as a precipitate and may be removed by passing the solution through a filter-press. The alkaline liqu or remaining is then similarlypassed through the carbonators K K. The bicarbonate of soda then formed being almost insoluble in solution of the chlorid of soda also separates in the form of crystals, which may be separated from the mother liquor on evaporation. The mother liquor is returned to the electrodialyzing apparatus X for use again. The bicarbonate of soda can be transformed into the carbonate, if desired.

\Vithout any further treatment the aforesaid electrodialyzing process produces chlorin suitable for bleaching, and a solution more or less concentrated of sodium hydrate suitable as a lye in many manufactures-for instance, in paper-mills and Wool and cloth Works.

I claim as my invention- The method of manufacturing chlorin, white lead, and bicarbonate of soda consistin g in exposing to an electric current an alkaline solution of chlorid of sodium circulating in negative cells and an acidulated solution of chlorid of sodium and hydrochloric acid at rest in positive cells, said negative and positive cells being separated from each other by porous diaphragms; drawing off the chlorin from said positive cells and the solution of enccof two Witnesses, this 1st day of July,

J ULES MEYRUEIS. \Vitnesses:

Rona. M. lloornn, ARTHUR Goon. 

